This is a problem whenever someone outside a culture tries to design for that culture. I have just enough knowledge of say, CJK+Arabic to read them, but not enough to know if the font/kerning/justification I'm using is attractive or ugly to natives.

It's often easy to spot Chinese goods because English writing on the stickers or manuals is in that horribly ugly latin serif font with bad kerning, which almost certainly looks fine if you don't read English all day.